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1 <br /> ENVIROYTMENTAL HEALT" <br /> EPARTMENT <br /> �o SAN JOAQUIN COUNTY ! <br /> = G Unit Su eivisors <br /> v Donna K.Heran,R.E.H.S.' p { <br /> ` { Director 304 East Weber Avenue, Third Floor Carl Borgmari,R.E.H.S. 1 <br /> Al Olsen,R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R:E.H.S.,R.D.I. ! <br /> • P Pro ram Mana er Douglas W.Wilson,R.E.H.S. <br /> 4C�Fo. a` g g <br /> Laurie A.Cotulla,R.E.H.S: g g La Telephone: (209) 468-3420 Margaret orio,R.E.H.S. <br /> Program Manager Fax: (209) 464-0138 Robert McCleilon,R.E.H.S. <br /> Mark Barcellos,R.E.H.S. I <br /> i <br /> i <br /> DENNIS KIM <br /> JUN 2 7 2005 <br /> 22633 MOUNT EDAN <br /> SARATOGA CA 95070 <br /> RE: Proposed EI Dorado Appartments, Site Code: 0001475 <br /> 2450 S EI Dorado Street <br /> Stockton, California N <br /> San Joaquin County Environmental Health Department (EHD) is the lead agency <br /> providing the oversight of the investigation and cleanup of releases from <br /> underground storage tanks (USTs) within San Joaquin County. E.HD has a <br /> contract with the California State Water Resources Control Board to conduct a <br /> UST corrective action program. <br /> EHD issued a permit to Advanced Geo Environmental Inc. (AGE) on May 7, II <br /> 2002, for soil borings relating to a Phase II Site Assessment. On May 21, 2002 ' - <br /> AGE completed Phase 11 Assessment Report for Construction, Testing & <br /> Engineering Inc. (CET)"!summarizing the findings for the soil borings; the soil <br /> results evidenced petroleum hydrocarbon contamination from unknown sources:' <br /> The AGE report included a recommendation for additional soil and groundwater, <br /> sampling. The additional work was performed on July 24, 2002. <br /> On August 19, 2002, EHD received Subsurface Investigation Report prepared by <br /> AGE dated August 15, 2002. The report contained the analytical results for the <br /> sampling performed by AGE on July 24, 2002. Petroleum hydrocarbon: <br /> contamination was evidenced in the soil and groundwater samples from several <br /> unknown, non-UST sources. <br /> EHD referred your siter to the Central Valley Regional Water Quality Control '. <br /> Board (CVRWQCB) for 'site investigation and cleanup oversight of the pollution <br /> documented in the Phase 11 Site Assessment. The CVRWQCB responded to you ' <br /> in a recommendation letter dated September 4, 2002. <br /> On November 11, 2002, AGE notified EHD of two abandoned USTs found during';. <br /> an exploratory excavation. EHD staff performed an inspection to verify the <br /> presence of the two USTs and documented the reported release. EHD filed an <br /> Unauthorized Release Report on November 12, 2002, for the petroleum released <br /> from the two improperly abandoned redwood USTs. The USTs were removed on <br /> November 26, 2002. Free phase diesel or heating oil like petroleum hydrocarbon <br /> liquid was pumped from the UST excavation and soil samples were collected for <br /> f <br />